package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.stream.Collectors;

/**
 * @author xyiaao
 * @description 针对表【setmeal(套餐)】的数据库操作Service实现
 * @createDate 2022-02-06 10:55:06
 */
@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishService setmealDishService;

    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     *
     * @param setmealDto
     */
    @Override
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);
        //获取菜品信息
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        //通过stream遍历
        setmealDishes.stream().map((item) -> {
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        setmealDishService.saveBatch(setmealDishes);
    }

    /**
     * 删除套餐及其关联数据
     *
     * @param ids
     */
    public void deleteWithDish(List<Long> ids) {
        //查询套餐状态，确定是否可用删除
        LambdaQueryWrapper<Setmeal> lqw = new LambdaQueryWrapper<>();
        lqw.in(Setmeal::getId, ids).eq(Setmeal::getStatus, 1);
        int count = this.count(lqw);
        if (count > 0) {
            //如果不能删除，抛出一个业务异常
            throw new CustomException("套餐正在售卖中，无法删除");
        }

        //如果可以删除，先删除套餐表中的数据---setmeal
        this.removeByIds(ids);

        LambdaQueryWrapper<SetmealDish> qw = new LambdaQueryWrapper<>();
        qw.in(SetmealDish::getSetmealId,ids);
        //删除关系表中的数据----setmeal_dish
        setmealDishService.remove(qw);
    }

    /**
     * 根据id查询套餐及其关联数据
     * @param id
     * @return
     */
    public SetmealDto getByIdWithDish(Long id) {
        //查询菜品基本信息，从dish表查询
        Setmeal setmeal = this.getById(id);

        SetmealDto setmealDto = new SetmealDto();
        BeanUtils.copyProperties(setmeal,setmealDto);
        //创建条件查询
        LambdaQueryWrapper<SetmealDish> lqw = new LambdaQueryWrapper<>();
        //查询当前菜品对应的口味信息，从dish_flavor表查询
        lqw.eq(SetmealDish::getSetmealId,setmeal.getId());
        List<SetmealDish> list = setmealDishService.list(lqw);

        setmealDto.setSetmealDishes(list);

        return setmealDto;
    }

    /**
     * 修改套餐信息及其关联数据
     * @param setmealDto
     */
    public void updateWithDish(SetmealDto setmealDto) {
        //修改套餐基本信息
        this.updateById(setmealDto);
        //删除菜品信息，从dish中删除
        LambdaQueryWrapper<SetmealDish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(SetmealDish::getSetmealId,setmealDto.getId());
        setmealDishService.remove(lqw);
        //将信息菜品新添加进去
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)->{

            item.setSetmealId(setmealDto.getId());
            return item;

        }).collect(Collectors.toList());

        setmealDishService.saveBatch(setmealDishes);

    }


    @Override
    public Integer countSaleNum(Long id, String beginTime, String endTime) {

        Integer saleNum = setmealMapper.countSaleNum(id, beginTime, endTime);
        return saleNum == null ? 0 : saleNum;
    }
}
